Essentially, the return of "creationism", with less emphasis on a christian God, but more emphasis on the nature of "design".

Particularly point out "irreducible complexity" ie. things which "obviously" couldn't have evolved in a series of incremental steps (because each part is dependent on the others for its usefulness.) Evolutionists have pointed out long ago, of course, that this problem exists and have posited "scaffolding" elements to support them. Or that some traits began their evolution for one purpose and then became adapted to a second.

However, IDers think that some interdependency can't be plausibly solved this way. (Still GodOfTheGaps, of coure.)